Title: Studies on adsorption potential of oil-extracted marine macro algae Padina gymnospora for the removal of methylene blue

Authors: Mohammed Khan Faisal; Parthasarathy Saranya; Lingesan Prameela; Sahadevan Renganthan

Addresses: Department of Chemical Engineering, A.C. Tech Campus, Anna University, Chennai - 600 025, India ' Centre for Biotechnology, A.C. Tech Campus, Anna University, Chennai - 600 025, India ' Department of Chemical Engineering, A.C. Tech Campus, Anna University, Chennai - 600 025, India ' Centre for Biotechnology, A.C. Tech Campus, Anna University, Chennai - 600 025, India

Abstract: The biosorption potential of Padina gymnospora for the methylene blue dye from the aqueous dye solution was studied. The effect of sorbent dosage, agitation, temperature, contact time and initial dye concentration on the uptake capacity of the biomass was studied in batch. The uptake capacity at equilibrium varied from 73.64 mg g⁻¹ to 460.26 mg g⁻¹ with increasing initial dye concentration of 20−100 mg L⁻¹ for a biomass of 0.2 g. It was found that the biomass showed maximum adsorption capacity at 100 mg L⁻¹ dye solution for a sorbent dosage of 0.2 g at 20°C with an agitation speed of 100 rpm. The equilibrium data was found to fit well with Freundlich isotherm and the reaction was found to follow the pseudo second order kinetics. The surface morphology of the biomass and the presence of various functional groups responsible for the adsorption were examined using SEM and FTIR.

Keywords: biosorption; FTIR; Freundlich isotherm; kinetics; methylene blue removal; Padina gymnospora; SEM; textile dyes; dye removal; adsorption potential; oil-extracted marine macro algae; sorbent dosage; agitation; temperature; contact time; initial dye concentration; biomass uptake capacity; wastewater treatment.

DOI: 10.1504/IJESD.2016.077378

International Journal of Environment and Sustainable Development, 2016 Vol.15 No.3, pp.272 - 285

Received: 04 Apr 2015
Accepted: 29 May 2015
Published online: 29 Jun 2016 *

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